Hot top for ingot-molds



T. McNALLY AND W. S. ORR.

HOT TOP FOR INGOT MOLDS.

APPLICATION FILED OCT. 30. 1919.

Patnted Nov. 29, 1921;

2 SHEETS-SHEET i.

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WITN ESSES ATTORNEY l WITNESSES v T. McNALLY AND W. 8.0%.

HOT TOP FOR INGOT MOLDS.

APPHCATION man act. 30. 1919. 1,98,7QQ Patanted Nov. 29, 119216 2 SHEETS-SHEET 2 INVENTORS, I,

A'ITOFQNEY (stats 'rnomns mommy Ann WILLIAM s. ORR, or Massif-Lon, 'onro, nssrenon's TO THE cnnrnan srnnn COMPANY, or MASSILLON, omo, A eonrone'rron or OHIO.

'HOT TOP FOR INGOT-MOLDS.

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Specification of Letters Patent.

Patented Nov. 29,1921.

Application filed October 30, 1919: Serial No, 334,492.

To all whom it may concern:

Be it known that we, THOMAS MCNALLY and WILLIAM S. ORR, citizens of the United States, residing at Massillon, in the county of Stark and State of Ohio, have invented a new and useful Hot Top for Ingot-Molds,

of which the following is .a specification. This invention has reference to hot tops for ingot molds, and its object is to provide a hot top having relatively long life, such suitable mass of molten metal above and in position to feed into the mold as cooling progresses, and provision is made whereby the metal in the hot top retains its heat and molten condition after the metal in the body of the mold has cooled, whereby the liability of the formation of. piping is reduced to a 'such hot top, the structure is made in the minimum;

To provide for the retention of the heat 1n the hot top with economical production of form of a hollow casting with the usual core, but in the-use of the hot top, the core is retained, such corebeing' customarily of sand orcasting loam, and such core serves as a heat insulator so situated that warping or cracking of the hot top is avoided, and such hot top may be used repeatedly without harmful eflect upon it.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming part of this specification, with the understanding, however, .that the invention is not confined to any strict conformity with the showing in the drawings, but may be changed and modified solong as such changes and modifications mark nomaterial departure from the salient features of the invention as expressed in the appended claims.

In the drawings,

Figure 1 is a vertical section through the upper end of an ingot mold, with the hot top applied in section and in the same plane as the mold; 7 Fig. 2 is an elevation of a hot top at right angles to the showing of Fig. 1

s Fig- 3 is a section through the hot top removed from the mold withthe section taken on a plane at right angles to that of Fig. 1;

Fig. 4 is a plan view of the hot top;

Fig. 5 is an elevation of a modified form of a hot top; Y

Flg. 6 is a section on the line, 6-6 of 5;

Fig. 7 is a section on theline 77 of Fig. 5.

Referring to the drawings, there is shown in Fig. 1 an ingot mold 1 which may be of common construction and therefore requires 7,

no special description. Such mold is used in an upright position, wherefore that part of. the mold appearing at the top in Fig. 1 constitutes the upper end of the mold.

There is also provided a hot top 2 conin the particular showing of the drawings is approximately rectangular.

The hot top is provided with inneftvalls 3, outer walls 4, a closed hollow flange 5 at the lower edge which, in the showing of Fig. 1 and associated figures, is of sulficient length to enter for a short distance into the upper end or mouth of the mold'l. The top of the space between the walls 3 and 4 is closed by a wall 6, except that certain openings 7 are left. These openings are provided to permit the escape of the gases arising within the chamber defined by the walls 3, 4, 5, 6, during the manufacture of the hot top. When the hot top is completed, these has heat insulating qualities, may be re-.

tained, or some other suitable material may be substituted for it.

To facilitate the'manipulation of the hot top, handles 11, which may be of web and flange construction, are formed on opposite sides of the hot top.

. The flange 5 is of suitable length to extend sufficiently into the top of the mold to properly retain the hot box and is beveled on the outer side so that it will freely enter the top of the mold. Where the flange 5 extends from the bottom of the hot top, a

forming in cross sectional shape to that of Y the upper end of the mold 1, which shape with the difi'erence that, instead of shoulder 12 is formed, and this shoulder,

where resting upon the top of the mold, has a groove 13 therein so that fire clay 13*, or other heat resisting material, to the depth of .about one half an inch, may be placed on the upper wall. of the mold and lfill the groove and thus seal the joint'between the shoulder 12 and the top of the mold 1, and

thereby prevent formation of fins due to the exudation of molten metal which, when the structure is. in operation, rises into the hot the hot top is set on the mold.

In Figs. 5, 6 and 7, the structure is simi- ,ner and outer walls and a centrally located lar to that of Fig. l'and associated figures,

the hollow flange 5, there is rovided a shorter,

solid, flange 14 ofsufliclent length to enter a suitable distance into mouth of the mold 1.

When the hot top is in operation, with the level of molten metal reaching for an appropriate distance above the bottom of the hot top diation of heat from the hot top is retarded by the heat insulatin ualities of the core Within the hot top." oreover, the coreis the upper end or of a nature to resist the efiectssof heat,

' wherefore the hot top i great variations of heat in different .por-' that warping 1s,

s not subjected to tions of it, with the result to a large extent, if not entirely, avoided. This contributes markedly to the lasting qualities of the hot top, and experience has shown that thelife of the hot top is greatly prolonged and each hot top may be repeatedly used, wherefore the economy of use of the hot top is pronounced. Because of the heat retaining qualities-of the hot top. due to the inclosed' sand core employed in. the casting operation and permanently retained, or other suitablematerial substituted for. it the production of nearly eliminated.

Experience with this hottop has demon- "strated the fact that it will give a' greater percentage of solid steel from the amount 'ing a chamber filled with and above the top of the mold, ra-

'of the hot top. 4

- liminar pipes inthe ingots is very 1 ease-m poured than any other device known. Hot tops employing fire clay linings can only be used for one pouring, whereas the hot topof the present invention is capable of almost an indefinite period of use.

terior, and also having inner, outer, top and bottom'walls defining a closed chambelg and heat insulating chamberand comprlsing the corematerial employed in the casting operation.

2. A hot top for ingot molds having in-' material located ,in said passage through the hot top for-'communication with the interior of I the mold, the inner and outer walls being closed and definemployed'in the 'castingof the hot top, the inner wall of the hot top having a depending flange for entrance into theupperend of the mold.

3. A hot top with inner, outer, top and bottom walls defining'a chamber and filled with. heat insulating material, and connecting members 4;. The method of for ingot molds provided producing hot tops for.

the ,core material .80 or braces between the inner and outer walls ingot molds, consisting in providin'g'a core of heat insulating material and casting. in-

ner, outer, top and bottom walls aboutsaid 7 core, with'preliminar per Wall to permit t e and gases andsubsequently seallng the 'PIGirial wit in the hot top.

In testimony that we claim the foregoing .as our own, we have hereto aflixed our .tures inthepresence of two wltnesses.

Witnesse'sz L Laommn Lassen,

openings to retain the core mate;'

signa-,

openings in the upi escape of moisture 

